Well, I just took a look at your airline...
You're the top airline in your base, and you've already made another base.
I was under the impression that you were a small upstart, located in one of the major cities.
I don't see what you mean by all the routes are already congested. It's the people that are smaller than you that should be complaining. If you want to see congested, try taking a look at the major cities in the world. If you want to stay local, then look at Hong Kong, for congestion - it's worse than Tokyo. Just be glad a major airline hasn't decided to make your home one of his bases (yet).

Any ways, looks like you're better off than I had thought. Just keep branching out when possible. It's easy to make money in this game. You'll be up there soon enough.
Concerning jets; I made an inventory of what mine are earning, compared to my propellers...
Answer: Not much.
And my jets are on average of 96% capacity to boot.
Take it from me, I wouldn't be in a rush to get them. Besides, I just made a route to your base with one.
Sorry, had an extra 6 hours to burn, and your city had the most passengers within range.
Keep asking questions though, good way to learn.

Good Luck.